Dielectric Broadening and Enhanced Moderate-Temperature Piezoelectric Stability in BNZ-Modified BCZT Ceramics

IF 2.8 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electronic Materials Pub Date : 2026-07-23 DOI:10.1007/s11664-026-13014-6

Ying Li, Xian Du, Zhao Zhang, Hengyuan Zhang, Pingping Zhang, Yingying Zhao, Huiling Du

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引用次数: 0

Abstract

BaTiO₃-based lead-free piezoceramics are promising for electromechanical applications, but their piezoelectric response is still limited by poor thermal stability. Here, (Bi_0.5Na_0.5)ZrO₃ (BNZ) was introduced into (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃ (BCZT) ceramics to improve the moderate-temperature stability of the piezoelectric response. The optimized BCZT-4 wt.% BNZ ceramic achieved a room-temperature d₃₃ of 476 pC/N and retained about 82% of this value at 120°C. Structural and microstructural analyses show that BNZ modification preserves the perovskite framework while introducing subtle average lattice distortion, regulating the rhombohedral/orthorhombic phase balance, producing moderate grain refinement, and avoiding obvious Bi/Na-rich segregation. The improved stability is further associated with a broadened dielectric response, an upward shift of the dielectric maximum, and enhanced high-temperature resistive behavior. These results demonstrate that moderate BNZ modification is an effective strategy for balancing high piezoelectric activity and thermal reliability in BCZT-based lead-free ceramics.

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bnz改性BCZT陶瓷的介电展宽和中温压电稳定性增强

基于batio3的无铅压电陶瓷在机电应用方面很有前景，但其压电响应仍然受到热稳定性差的限制。在（Ba0.85Ca0.15）（Zr0.1Ti0.9）O3 （BCZT）陶瓷中引入（Bi0.5Na0.5）ZrO3 (BNZ)，提高压电响应的中温稳定性。优化后的BCZT-4 wt.% BNZ陶瓷室温d33为476 pC/N，在120℃时保持约82%。结构和微观结构分析表明，BNZ改性在保留钙钛矿骨架的同时，引入了细微的平均晶格畸变，调节了菱形/正交相平衡，产生了适度的晶粒细化，避免了明显的Bi/ na富集偏析。稳定性的提高进一步与电介质响应的扩大、电介质最大值的向上移动和高温电阻行为的增强有关。这些结果表明，适度的BNZ改性是平衡bczt基无铅陶瓷高压电活性和热可靠性的有效策略。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.